This article analyzes the sanctioning power of the UN Security Council from a constitutional perspective. After acknowledging the difficulties of the International Organizations to be accountable, this paper focuses on the so-called "smart" or "targeted sanctions" and the ways to limit the sanctioning power of the Security Council. The author will conclude on the necessity for this organism to assume progressively certain constitutional principles that other constitutional legal orders accept in order to guarantee the legitimacy of its sanctioning power, the effectiveness of these sanctions as well as to contribute to the stabilization of the inter-ordinal relations.